Jason Dusek wrote: > I managed to build GHC 6.12 in Nix on Ubuntu after some help > in an earlier discussion on this list. Now, my old Cabal > (built through Nix) complains about an invalid package format; > this is to be expected if it shells out to `ghc-pkg' to read > the package list. > > When I try to rebuild Cabal, it tries to build it against GHC > 6.10 instead of 6.12: > I do have GHC 6.10 still installed; but why does it not build > against the new GHC? Should I delete the `.drv' files? Perhaps > these cache something about which GHC to build against? Deleting .drv files cannot help as new packages do not depend on the old state of your ~/.nix-profile etc.
The key warning is "warning: there are multiple derivations named `cabal-install-0.8.0'; using the first one". You should use nix-env -i -A ... to select the needed cabal. _______________________________________________ nix-dev mailing list nix-dev@cs.uu.nl https://mail.cs.uu.nl/mailman/listinfo/nix-dev
